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Growth of ______________ is promoted by the presence of manganese in water?

August 29, 2021March 11, 2019 by admin

Growth of ______________ is promoted by the presence of manganese in water?

A. Files
B. Algae
C. Micro-organisms
D. Mosquitoes

Categories Chemical Environmental Engineering

The pH value of oxidised sewage is about_____________________?

Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?

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